Okay then, could you please answer my earlier question about scientific consensus in one particular instance? State your own opinion. It seems meta-relevant to the discussion. (My impression so far is that you are not as accepting of d-separation as the general public here. As in, the set of mammals and the set of unicellular organisms are d-separated, and at least one set that 'blocks' mammals from unicellulars is 'part of reptiles'. It means that learning some new feature about mammals, you can theorize about the corresponding feature/lack of it in reptiles, but you can't infer much about unicellulars. Consider this model: God -> Physics -> Civilization. God and Civilization are d-separated, with Physics as the blocking set.)